Tim McGraw and Dwight Yoakam are featured in supporting roles in the upcoming film, Four Christmases, starring Reese Witherspoon and Vince Vaughn. Set for release during the 2008 holiday season, the New Line Cinema film centers around a couple forced to visit all four of their divorced parents' homes on Christmas Day after years of avoiding their families during the holidays. McGraw, who began filming Monday (Jan. 14) in Los Angeles, is cast in the role of Dallas, a brother to Vaughn's character. It's McGraw's fifth film role. Four Christmases also stars Robert Duvall, Sissy Spacek, Mary Steenburgen and Jon Voight. The supporting cast includes Jon Favreau and Kristen Chenoweth.